Madden and Diaz "ran in the same circles and attended a lot of the same events and shows as Justin," the source continued. "Cameron and her gang were very friendly with them. So it's not like Cameron and Benji just met. Rather, they've recently reconnected."

"Keep in mind, Cameron dated Jared Leto for years," our source added. "[Benji is] not her first rocker. She likes rockers and she loves bad boys. Right now, they're totally into each other."

So, we'll see where it goes.

"Marriage, I highly doubt," the insider said. "Cameron's not into the idea. She's into love and long-term relationships, but a piece of paper isn't a huge priority for her."